25921345 has 16 divisors (see below), whose sum is σ = 34369920. Its totient is φ = 18667264.

The previous prime is 25921327. The next prime is 25921367. The reversal of 25921345 is 54312952.

It is a cyclic number.

It is not a de Polignac number, because 25921345 - 2⁹ = 25920833 is a prime.

It is a super-2 number, since 2×25921345² = 1343832253218050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4675 + ... + 8584.

It is an arithmetic number, because the mean of its divisors is an integer number (2148120).

Almost surely, 2^25921345 is an apocalyptic number.

It is an amenable number.

25921345 is a deficient number, since it is larger than the sum of its proper divisors (8448575).

25921345 is a wasteful number, since it uses less digits than its factorization.

25921345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13304.

The product of its digits is 10800, while the sum is 31.

The square root of 25921345 is about 5091.3009143047. The cubic root of 25921345 is about 295.9505677435.

The spelling of 25921345 in words is "twenty-five million, nine hundred twenty-one thousand, three hundred forty-five".